Probability Review AP Stat

If A and B are mutually exclusive, which statement below must be true?

• P(A∩B) = 0

• P(A|B) = 0

• P(A∪B) = 0

• P(A) + P(B) = 1

In an AP Statistics class, 57% of students eat breakfast in the morning, 80% of them floss their teeth, and 46% of the students do both.  What is the probability that a randomly chosen student eats breakfast or flosses their teeth?

• 91%
• 9%
• 11%
• 34%

In an AP Statistics class, 57% of students eat breakfast in the morning, 80% of them floss their teeth, and 46% of the students do both.  What is the probability that a randomly chosen student eats breakfast but does not floss their teeth?

• 9%
• 11%
• 34%
• 91%

According to the National Telecommunication and Information Administration, 50.5% of U.S. households had internet access in 2001.  What is the probability that four randomly selected U.S. all had internet access in 2001?

• 6.5%
• 12.6%
• 49.5%
• 50.5%

A bicycle shop equips 60% of its bikes with a water bottle holder, and 55% of its bikes are equipped with a kick stand.  34% of the bikes have both features.  What is the probability that a randomly chosen bike has a kick stand GIVEN THAT it has a water bottle holder?

• 34%
• 56.7%
• 61.8%
• 81%

The probability of a tourist visiting an area cave is .7, and of a tourist visiting a nearby park is .6.  The probability of visiting both places on the same day is .4.  The probability that a tourist visits at least one of these two places is:

• .08
• .28
• .42
• .9

What is the probability that the person picked will be a boy given they speak german? 

• .7273
• .4
• .16
• .22

What is the probability that a female is chose given they like a Toyota? 

• .525
• .4627
• .6774
• .3143

P(Shorts and Shoes):

• 1/6
• 6/16
• 22/16
• 6/22

What is P(Foreign language | Sport)?

• 14/27
• 7/12
• 23/47
• 37/47